<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-button type="primary" @click="addDialogVisible = true"
          >添加角色</el-button
        ></el-row
      >

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" style="width: 100%" border stripe row-key="id">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              class="el-row1"
              :class="['bdbottom', i1 === 0 && 'bdtop', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 通过 for 循环 嵌套 渲染二级权限-->
              <el-col :span="19">
                <el-row
                  :class="['bdtop', i2 === 0 && 'bdtop ', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      type="success"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" prop="prop" label="#"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column prop="" label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="small"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="small"
              @click="removeUserById(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配角色按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="small"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      :close-on-click-modal="false"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="FormRules"
        ref="addFormRef"
        label-width="70px"
        label-position="right"
      >
        <el-form-item label="角色名称" prop="roleName" label-width="90px">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc" label-width="90px">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      :close-on-click-modal="false"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editForm"
        :rules="FormRules"
        ref="editFormRef"
        label-width="70px"
      >
        <el-form-item label="角色名称" label-width="90px">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc" label-width="90px">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      :close-on-click-modal="false"
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        :default-checked-keys="defKeys"
        ref="treeRef"
        show-checkbox
        node-key="id"
        default-expand-all
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default
  {
    data() {
      return {
        // 所有角色列表数据
        rolelist: [],
        // 控制添加用户对话框的显示与隐藏
        addDialogVisible: false,
        // 添加角色的表单数据
        addForm: {
          roleName: '',
          roleDesc: '',
        },
        FormRules: {
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' },
            { min: 3, max: 10, message: '用户名的长度在3~10个字符之间', trigger: 'blur' }
          ],
        },
        // 控制修改用户对话框的显示与隐藏
        editDialogVisible: false,
        // 查询到的用户信息对象
        editForm: {},
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数值
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点ID值数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: '',
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      // 获取权限列表
      async getRolesList() {

        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }

        this.rolelist = res.data
        // console.log(this.rolelist);
      },

      // 监听添加角色对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 添加角色信息并提交
      addUser() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return
          // 可以发起添加角色的网络请求
          const { data: res } = await this.$http.post('roles', this.addForm)
          // console.log(res.meta.status);

          if (res.meta.status != 201) {
            this.$message.error('添加角色失败！')
          }
          this.$message.success('添加角色成功！')
          // 隐藏添加角色的对话框
          this.addDialogVisible = false
          // 重新获取角色列表
          this.getRolesList()
        })
      },
      // 监听修改角色对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 展示编辑角色的对话框
      async showEditDialog(id) {
        // console.log(id);
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status != 200) {
          return this.$message.error('查询角色信息失败')
        }
        this.editForm = res.data
        this.editDialogVisible = true

      },
      // 修改角色信息并提交
      editUserInfo() {
        this.$refs.editFormRef.validate(async valid => {
          if (!valid) return
          // 发起修改角色信息的数据请求

          const { data: res } = await this.$http.put('roles/' +
            this.editForm.roleId, {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          })

          if (res.meta.status !== 200) {
            return this.$message.error('更新用户信息失败！')
          }

          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getRolesList()
          // 提示修改成功
          this.$message.success('更新用户信息成功')
        })
      },

      // 根据ID删除对应的角色信息
      async removeUserById(id) {
        // 弹框询问角色是否删除数据
        const confirmResult = await this.$confirm('此操作将永久删除该角色数据, 是否继续?', '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
          // 如果角色取消了删除，则返回值为字符串 cancel
        ).catch(err => err)

        // 如果角色确认删除，则返回值为字符串 confirm
        // console.log(confirmResult)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除角色失败！')
        }
        this.$message.success('删除角色成功！')
        this.getRolesList()
      },

      // 根据Id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult = await this.$confirm('此操作将永久删除该权限数据, 是否继续?', '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
          // 如果角色取消了删除，则返回值为字符串 cancel
        ).catch(err => err)

        // 如果角色确认删除，则返回值为字符串 confirm
        // console.log(confirmResult)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        this.$message.success('删除权限成功！')

        role.children = res.data
      },

      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        // 把获取到的权限数值保存到 data中
        this.rightslist = res.data
        // console.log(this.rightslist);

        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)

        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限id，并保存到defKeys 数值中
      getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含chlidren 属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件，然后进行清空
      setRightDialogClosed() {
        this.defKeys = []
      },

      //点击为角色分配权限 
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.
            getCheckedKeys(),
          ...this.$refs.treeRef.
            getHalfCheckedKeys()
        ]
        // console.log(keys);
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }
        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      },

    },
  }
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>>